Interlocking barrier



FIG. 1 is a prospective view of an interlocking barrier showing my new design;

FIG. 2 is a rear end elevation view thereof;

FIG. 3 is a right side elevation view, the opposite side being a mirror image thereof;

FIG. 4 is a front end elevation view thereof; and,

FIG. 5 is a bottom elevation view thereof. 

The ornamental design for an interlocking barrier, as shown and described. 